Limiting large investors does not solve the problem, but it could help alleviate some acute symptoms.
black markets spring up to serve demand when there's law and regulation that tries to prohibit such demand. I don't see how making the real estate market this way is gonna get it better.
The only way to make prices drop is to increase supply. trying to tax a fringe group, or to penalize investors etc, is not going to do well at all. And doing so will also dry up investment for growing supply.
> help alleviate some acute symptoms.
A short term symptom abatement, if it even does abate anything, is not going to make any difference tbh. Concentrate on solving the fundamental issue - lack of supply due to various interest groups resisting supply growth.
https://www.brookings.edu/blog/the-avenue/2022/03/31/where-p...
https://noahpinion.substack.com/p/the-yimbys-are-starting-to...
But if supply gets constrained enough that prices complete detach from those fundamentals, then, sure, why not jump in? These investors are only in this market in the first place because of supply constraints, so it's not just that low supply is a more important factor than the investors -- the investors wouldn't even exist if not for the low supply!